Human Psychopharmacology: Clinical and Experimental
March 1, 2012
Catharine Montgomery, Alexandra L. Seddon, John E. Fisk et al.
56 citations
BACKGROUND: Research shows that cannabis users exhibit deficits in prospective memory (PM) and executive function, which persist beyond acute intoxication. However, many studies rely on self-reports of memory failures or use laboratory-based measures that may not mimic functional deficits in the real world. The present study aimed to assess real-world memory functioning. METHOD: Twenty...
Human Psychopharmacology Clinical and Experimental
September 7, 2011
Philip N. Murphy, Philip G. Erwin, L. Maciver et al.
9 citations
This study aimed to examine the relationship between the consumption of ecstasy (3,4-methylenedioxymethamphetamine (MDMA)) and cannabis, and performance on the random letter generation task which generates dependent variables drawing upon executive inhibition and access to semantic long-term memory (LTM). The participant group was a between-participant independent variable with users of both...
Journal of Psychopharmacology
February 2010
L Craig, John E. Fisk, C Montgomery et al.
Previous findings report use of the drug ecstasy (MDMA) to be associated with lower emotional intelligence (EI), and compromised functioning in brain areas responsible for emotion. This study explored the relationship between ecstasy use, EI, mood and parenting styles. Questionnaire measures of drug use, lifestyle, parenting style and EI were obtained, with separate IQ measures for fluid...
Neuropsychobiology
2009
Philip N. Murphy, Michelle Wareing, John E. Fisk et al.
49 citations
<i>Aims:</i> This review examined studies of executive functioning in abstinent ecstasy (3,4-methylenedioxymethamphetamine, MDMA) users on tasks which had been empirically mapped onto updating, shifting, inhibition and accessing long-term memory executive processes. Studies of some aspects of visuospatial memory performance were also included because of the investment of executive resources in...
Journal of Psychopharmacology
May 2006
Philip N. Murphy, Michelle Wareing, John E. Fisk
This self-report questionnaire study examined ecstasy users' perceptions of the risks associated with their use of ecstasy, their precautions against such risks, and its perceived effects on their lives. Gender differences in these areas were also explored. The sample comprised 328 ecstasy users (139 female, 187 male, one transsexual) with a mean age of 22.5 years (SD = 4.9 years)....
Experimental and Clinical Psychopharmacology
2005
Catharine Montgomery, John E. Fisk, Russell Newcombe et al.
22 citations
Previous research has demonstrated working memory and executive deficits in recreational users of MDMA (3,4-methylenedioxymethamphetamine; Ecstasy). In turn, both of these constructs have been implicated in syllogistic reasoning performance. Twenty-two MDMA users (mean age = 21.36) and 26 MDMA nonuser controls (mean age = 21.31) were tested on syllogisms of varying difficulty and on measures of...
Human Psychopharmacology: Clinical and Experimental
May 5, 2004
Michelle Wareing, John E. Fisk, Philip N. Murphy et al.
76 citations
Abstract Previous research suggests that MDMA users are impaired in various aspects of cognitive functioning, however, it remains unclear whether they might experience deficits in established measures of verbal working memory functioning. In the present study current and previous MDMA users were compared with non‐users on verbal working memory measures including reading and computation span....